Phonograph



Sept. 6, 1927. f 1.641.291

`.1. N. PEPIN PHONOGRAPH Filed May 1l. 1925 a\ IA x E1 WEE:

Patented Sept. 6, 1927.-

JOSEPH N. PEPIN, E CHICAGO, ILLINOIS.

PHONOGRAPH.

Original application led September 2, 1922, Serial No. 586,903.

Serial No. 535,192.

ii, 192s.

kind described having means for adjustablyA counterbalancing the weight of the tone arm and to provide an improved type of mounting for thev tone arm.

Many other objects and advantages of the construction herein shown and described will be obvious to those skilled in the art from the disclosures herein given.

To this end myl invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly pointed out in the claims.

1n the drawings, wherein like reference characters indicate like or corresponding parts:

' Fig. 1 is a side elevation, partly in section, of my improved device;

Fig. 2 is a section taken substantially on the line 2 2 of Fig. 1;l

Fig.v 3 is a section taken substantially on the line 3&3 of Fig. 1; j i

Fig. 1 is a lsection taken substantially on the line 11--1 of Fig. 5; and

Fig. is a section-taken substantially on the line 5 5 of Fig. 4.

Referring to the drawings, wherein the preferred embodiment of my invention is shown, the mechanism illustrated consists of a tubular tone arm casing or support 1 and a cooperating` tubular tone arm Vpart 2 slidably engageable therewith. A sound box or reproducer 3 is connected at the free end of the tone arm 2 and carries the stylusreceiving member 4: arranged to cooperate with the record 5. The top of the cabinet of the talking machine is indicated at 6. The tone arm casing or support 1 is tubular and is preferably mounted on the cabinet so as to be adjustable relatively thereto. yThe part 1 is preferably L-shaped, or is turned `the aligned axes of said pins.

Divided and this application `filed May upper end. A socket bearing or ring 12 having its lower outer edge cut away to form a horizontal flange 13 and a vertical annular flange 1a, radially inwardly thereof, fits over and within thev iiange 11 of the sleeve 9 and is rotatable thereon to form a bearing therefor.

A cooperating lock member or ring 15 is arranged within the Isleeve 9 and is secured to the part 12 by screws 16, or the like, to prevent accidental withdrawall of the part L2. A pair of pivot pins 16, carried by the bearing ring` 12, extends through said ring and projects inwardly of its bearing surface to engage recesses in the ball8 of the tone arm to permit said tone arm to pivot about Thus it is seen that not only is there a rocking movementof the tone arm about` the axes of the pins 16 permitted, but that the 'entire tone arm and the parts 13 and 15 carried thereby may be rotated relative to the sleeve'9 in a plane perpendicular to said rocking or pivotal plane, thus permitting a universal moveof said arm' has a limited vvertical movement as well as a movement in a horizontal plane. In order to reduce friction as much as possible so that the arm may be easily swung or turned in a horizontal plane, l preferably provide roller bearings 17 between the sleeve 9 and the ring 15. These bearings may be mounted by means of screws 17, or the like, on the flange 11 of the collar part 9 so that the roller will engage the opposed surfaces of the flange 13 and the part 15. Recesses or cut-away portions 18 may be provided at circumferentially spaced points about the inwardly extending flange 11 and into which said rollers may be positioned.

As shown more clearly in Figs. 2, l1 and 5, I prefer to yieldably support or counterbalance the weight of the tone arm and its associated parts so that its outer or free end is maintained substantially with the correct thrust upon the record but permit a slight yment of the tone arm so that the free end'v vertical play of the arm when lthe mechanism is in operation. The means for this purpose comprises a spring 18 secured at one end of the base of the tone arm, thev other end being adju's'tably secured by means of a screw 19, or the like, to a lnracket 20 carried by the ring;l l5; whereby the tension of the spring may be varied as desired. rlhe spring not only supports the free end of the tone arm, but to a certain extent acts as a shock abscrbcr when the tone arm turned laterally into engagement with the record, thereby reducing;` the Wear on the record and vthe stylus The tone arm part 2 is both 'rotatable and slidable longitudinally relative to the tone arm part l, the limit of travel of the sliding movement being` ccntrolled in a manner to be described. ln Fig'. l it Will be particularly noted that l have provided a slot in the tone arm part 2 and extending' substantially spil-ally therealong, While the part l has threaded through the Wall thereof a pin 22, the inner end of which is reduced and positioned Within the slot for properly guiding' the part 2 in its movement. Apertures 23 are provided in the part 2 adjacent each end of th'e'slot 2l to form ,end stops, and into these apertures is adapted to be positioned a 'locking pin or plunger '2% securely retained Within either one of the apertures by means of the spring member 22, one end of which is rigidly attached to the arm l and the other en d supporting the pin 24u' ln this manner it is necessary that a slight pressure be exerted to turn the arm 2 in order to overcome the resistance of the detent 24; in the stop Aholes 23. rhus not only is the tone arm locked in place in the part l, and its Amovement governed by the slot and plunger connection shown, but in its tivo extreme positions the same is yieldabl'y locked 1n positiOn.

Having. thus 4described my invention, it is obvious that various immaterial modificanearael hence l do ynot wish to be understood as limiting` myself to the exact form, con-struction, arrangement and combination of parts herein shown and described or uses mentioned. v

l/Vhat l claim as new and desire to secure by Letters Patent is: l. ln a device of the kind described and in combination` a phonograph comprising' a table, a tone arm having an enlarged ball portion at one end, a collar adaptedlto be mounted on said table at the soundl chamberV thereof and having` an inwardly directed `annular flange provided `with circumferentially spaced recesses therein, an anti-friction roller mounted on said annular flange in each `of .said recesses, ring` members arranged at the upper and lower sides of said nular flange provided with circumferentially spaced recesses therein, anti-friction rollers mounted on said annular flange in said recesses, ring members arranged at the upper 'and lower sides of said flange and engageable with said rollers and With Vthe ball portion of the tone armvto form a bearing therefor, and means for resiliently counterbalancing),` the Weight of said tone arm, said last-mentioned means comprisinga spring' secured at one end to said ball portion of the tone arm and a screw/.carried by one of said ring` members and adjustably secured to the other end of said spring.

ln testimony whereof, l have hereunto. signed my name.

JOSEPH Vu. Purin- 

